Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Daigo FUJIWARA"'
Autor:
Daigo Fujiwara, Takumi Tonoike
Publikováno v:
ROBOMECH Journal, Vol 11, Iss 1, Pp 1-15 (2024)
Abstract This paper describes the development and the verification of flight test results of a differential pressure-based, two-dimensional low-airspeed sensor designed for the navigation or disturbance detection in small helicopters. The compact and
Externí odkaz:
https://doaj.org/article/ae610ddb8ee84d918b5e58cefb60e14c
Autor:
Shinichi Ijuin, Satoshi Ishihara, Masafumi Fukushima, Daigo Fujiwara, Masafumi Suga, Shota Kikuta, Akihiko Inoue, Shigenari Matsuyama, Tetsunori Kawase, Shinichi Nakayama
Publikováno v:
Clinical Case Reports, Vol 9, Iss 1, Pp 105-108 (2021)
Abstract We report a case of vascular injury caused by a multi‐lumen catheter for CRRT inserted through left jugular vein. Diagnosis was delayed because CRRT could be continued. Clinicians should be aware of potential vascular complications associa
Externí odkaz:
https://doaj.org/article/7e3318c31f954ae5a2ad0bf9864c13a9
Autor:
Daigo FUJIWARA
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 87, Iss 900, Pp 21-00170-21-00170 (2021)
The design method for reference trajectory calculation and flight control system development of the autonomous hammer-head turn maneuver and verification results applied to unmanned helicopters are described. The whole maneuver is divided into four p
Externí odkaz:
https://doaj.org/article/5bd77bccbe074f0f9248e9439a3a72b0
Autor:
Takumi TOMITA, Daigo FUJIWARA
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 87, Iss 898, Pp 20-00440-20-00440 (2021)
Automatic autorotation landing system for helicopters that is applicable under various flight conditions is proposed. This system consists of a control system that stabilizes rotational speed of the main rotor and reduces the descent speed before lan
Externí odkaz:
https://doaj.org/article/cb917b97bfc749c7a65eb6310324b89b
Autor:
Daigo FUJIWARA, Takayuki SHIOKAWA
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 83, Iss 854, Pp 17-00087-17-00087 (2017)
Aiming at the realization of agile autonomous flight for the extension of the flying range of single-rotor helicopters in the limited flight time, the flight control system design and the control performance verification for the high-speed turn fligh
Externí odkaz:
https://doaj.org/article/8dbf96695be640ada585c9369429732a
Autor:
Naomichi ISOMURA, Daigo FUJIWARA
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 83, Iss 854, Pp 17-00013-17-00013 (2017)
Flight control system with position compensation applicable to trajectory tracking of agile maneuvers that require an attitude rotation and a reverse of main rotor thrust of single-rotor helicopters is proposed. The outer loop position compensator ca
Externí odkaz:
https://doaj.org/article/00c4a049e88c44f9b61def351d62aea4
Autor:
Naomichi ISOMURA, Daigo FUJIWARA
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 82, Iss 837, Pp 15-00661-15-00661 (2016)
Applications of small unmanned helicopters are rapidly growing in the civilian and commercial field such as pesticide spraying, aerial filming, and inspection. However, accidents often happen from deficient of operator skill, which leads to a large d
Externí odkaz:
https://doaj.org/article/0f602b675e7e4be495443389fc304e6f
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 82, Iss 837, Pp 15-00660-15-00660 (2016)
This paper describes 5-axis centralized feedback control system for a single-rotor helicopter. Optimal control theory is directly applied to 25-state Multiple-Input Multiple-Output (MIMO) analytical linear model of a small-scale unmanned helicopter w
Externí odkaz:
https://doaj.org/article/220b658f92f447e695a468b8e0f60a48
Autor:
Daigo FUJIWARA
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 81, Iss 832, Pp 15-00431-15-00431 (2015)
This paper describes considerations of the effectiveness about the recovery control of the yaw rate motion of single-rotor helicopters by using both motors (engines) and main-rotor brakes in autorotation flight under tail-rotor damage conditions. Fir
Externí odkaz:
https://doaj.org/article/bb2ee16fae55459cbb1f5698f9ed33a4
Autor:
Daigo FUJIWARA, Masato OTA
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 80, Iss 817, Pp TL0279-TL0279 (2014)
Aiming at the flight control design of small helicopters for large flight envelopes, a comprehensive modeling of small electric helicopters, based on the analyses of main blades divided into elements on which air speeds and aerodynamic forces are cal
Externí odkaz:
https://doaj.org/article/be72ca9180b347ee977c6712e923c141